See GetRtFileInfoByHandle, GetRtFileAttributes

typedef struct tagFileAttributes {
    DWORD           dwFileAttributes;
    DWORD           dwNumberOfLinks;
    QWORD           qwVolumeId;
    QWORD           qwFileIdLow;
    QWORD           qwFileIdHigh;
    QWORD           qwFileSize;
    TIMEVALUE       tCreateTime;
    TIMEVALUE       tAccessTime;
    TIMEVALUE       tModifyTime;
} FILE_INFO_COMMON;

Fields

dwFileAttributes

A bitfield representing the file attributes. Bit definitions as follows:

Attribute	Description
FILE_ATTR_READONLY	File is read-only
FILE_ATTR_HIDDEN	File is hidden
FILE_ATTR_SYSTEM	File is marked as a system file
FILE_ATTR_DIRECTORY	File is a directory
FILE_ATTR_ARCHIVE	File is marked for archiving
FILE_ATTR_DEVICE	File is a device
FILE_ATTR_NORMAL	File is a normal file (no other attribute bits are set)

dwNumberOfLinks

The number of links to the file

qwVolumeId

The identifier for the current volume.

qwFileIdLow

Unique filenumber for the file (low 64 bits)

qwFileIdHigh

Unique filenumber for the file (high 64 bits)

qwFileSize

The number of bytes contained in the file.

tCreateTime

The time that the file was created.

tAccessTime

The time that the file was last accessed.

tModifyTime

The time that the file was last modified.